▀ R-eWAG Configuration
For more information on virtual APN in R-eWAG + GGSN combo deployments, refer to the Enhanced Wireless
Access Gateway Overview chapter.
In the IP access group configuration, the access list (
the destination context with ECS redirect ACL. See the Access List Configuration section.
For R-eWAG, the Firewall-and-NAT policy for subscribers can be specified either in the APN template or in the
ECS rulebase. For selection, the policy specified in the APN configuration has higher priority than the one
specified in the ECS rulebase configuration.
Configuring the SGTP Service
To create and configure the SGTP service use the following configuration:
configure
context <context_name>
sgtp-service <sgtp_service_name>
#To configure GTP-C parameters:
gtpc { bind address <ipv4_address> | dns-sgsn context <context_name> | echo-
interval <echo_interval_seconds> | echo-retransmission { exponential-backoff [ [ min-
timeout <min_retrans_timeout_seconds> ] [ smooth-factor <smooth_factor> ] + ] | timeout
<retrans_timeout_seconds> } | guard-interval <guard_interval_seconds> | ignore response-
port-validation | ip qos-dscp { af11 | af12 | af13 | af21 | af22 | af23 | af31 | af32 |
af33 | af41 | af42 | af43 | be | ef } | max-retransmissions <max_retransmissions> |
retransmission-timeout <retrans_timeout_seconds> | send { common flags | rab-context |
target-identification-preamble } }
#To configure GTP-U parameters:
gtpu { bind address <ipv4_address> | echo-interval <echo_interval_seconds> |
echo-retransmission { exponential-backoff [ [ min-timeout <min_retrans_timeout_seconds> ]
[ smooth-factor <smooth_factor> ] + ] | timeout <retrans_timeout_seconds> } | max-
retransmissions <max_retransmissions> | retransmission-timeout <retrans_timeout_seconds>
}
#To configure path failure detection policy:
path-failure detection-policy gtp { echo | non-echo } +
#To configure the restart counter change window to avoid service deactivations and
activations that could cause large bursts of network traffic if the restart counter
change messages from the GGSN are erroneous:
max-remote-restart-counter-change <variance>
end
Notes:
The SGTP service must be associated in the R-eWAG service configuration.
▄ Cisco ASR 5000 Enhanced Wireless Access Gateway Administration Guide
54
RADIUS-based Enhanced Wireless Access Gateway Configuration
) specified must be configured in
<access_list_name>